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Modifying prototypes in JavaScript
Following is the code for modifying prototypes in JavaScript −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 20px;
font-weight: 500;
color: blueviolet;
}
</style>
</head>
<body>
<h1>Modifying prototypes in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to see the original and modified prototype function</h3>
<script>
let resEle = document.querySelector(".result");
let BtnEle = document.querySelector(".Btn");
function Person(name, age, occupation) {
this.name = name;
this.age = age;
this.occupation = occupation;
}
Person.prototype.displayInfo = function () {
return `Name: ${this.name} Age: ${this.age} Occupation: ${this.occupation}<br>`;
};
let person1 = new Person("Shawn", 20, "student");
let person2 = new Person("Rohan", 25, "Manager");
BtnEle.addEventListener("click", () => {
resEle.innerHTML =
"Before Modifying prototype <br>" +
person1.displayInfo() +person2.displayInfo();
Person.prototype.displayInfo = function () {
return `Occupation: ${this.occupation} Age: ${this.age} Name: ${this.name} <br> `;
};
resEle.innerHTML +="<br>After Modifying prototype <br>" +
person1.displayInfo() +person2.displayInfo();
});
</script>
</body>
</html>
Output
On clicking the ‘CLICK HERE’ button −
Updated on: 2020-07-20T08:04:03+05:30
181 Views
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